Even when renewable energy is relatively cheap to produce, current costs to store huge amounts of solar and wind power can be two or three times the value for utilities supplying electricity.
Choosing energy-efficient appliances, such as Energy Star, making a few small repairs and adjusting some behavior can help consumers save hundreds of dollars a year in energy costs.
With gasoline prices still stubbornly high, a new fuel from an old source could keep America moving more cheaply in the near future. It's coal-based ethanol and Celanese is making a big bet on it.
Automakers are gearing up for mass-market production of hydrogen-powered cars starting in 2015, but the fuel-cell technology has plenty of skeptics, including President Barack Obama.
The resulting yo-yo effect on fuel prices for the last three years has made it hard for consumers and businesses to loosen their purse strings enough to jump start the lackluster economy.
Energy used to be something we took for granted; it is was cheap, accessible and plentiful. Now, energy seems precious, complicated and fractious, a chip in the high-stakes game of geopolitics.
With all its attributes, solar energy still hasn't taken off with consumers. What's not to like. Apparently, a lot. For one, switching over is a" a hassle," says a solar firm CEO.
Much has changed since the last major piece of energy legislation in 2005.
Republicans and Democrats in Congress are deeply divided over how it will help meet future energy needs.
From autos to appliances to high-tech gadgets, there are lots of choices for conumers.
What do you know about energy? Take our quiz and find out.
NADAguides, a publisher for vehicle pricing, came out with its annual list of the most fuel-efficient vehicles of 2011. Click ahead for the 2011 model year’s most fuel efficient vehicles.
Is space exploration a wise investment given the nation's budget problems?
Recent surveys show energy supply concerns are forcing corporate offices to implement energy-reduction ideas, from lighting retrofits and HVAC system upgrades, to building redesign and rooftop solar panels, as much as climate change considerations.
With the most recent data from the Energy Information Administration and the CIA World Factbook, here are the countries with the biggest proven oil reserves.
How does the explosion of the Deepwater Horizon platform stack up to the biggest oil disasters in history? Find out!
Growing support for energy independence and a cleaner environment is driving a mix of market forces and legislative mandates toward renewable energy, which is translating into real jobs.
Oil prices fell as traders awaited U.S. crude inventory data and weighed comments from OPEC members regarding an output cut.
Home Depot slashed its stores' carbon footprint by using Bloom Energy fuel cell servers.
Iraq is OPEC's second largest producer, but analysts say the odds of Baghdad being exempt from planned output cuts are actually good.